Rule History

alert tcp-pkt $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Suspected Parallax RAT Checkin"; flow:established,to_server; dsize:<300; content:"|09 b4 30 eb 6a 8d 00 11|"; startswith; fast_pattern; content:!"HTTP"; threshold: type both, count 5, seconds 60, track by_src; reference:url,www.esentire.com/blog/unveiling-parallax-rat-a-journey-from-infection-to-lateral-movement; reference:md5,4c3021987d039f59a3aa6fcd423143f5; reference:md5,2b199211ed7ddd31f0a5f0c651f44457; reference:md5,e50508784f3b00921f2507279ebce81a; classtype:trojan-activity; sid:2051947; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, tls_state plaintext, created_at 2024_04_05, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_05; target:src_ip;)